LIGHTPROOF Synonyms: 23 Similar and Opposite Words

lightproof

adjective

Definition of lightproof

as in waterproof

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Recent Examples of Synonyms for lightproof

Adjective

Dual 6-watt drivers push 12 watts of stereo sound, BassUp gives the low end a little extra kick, and the IPX7 waterproof build means splashes and rain aren’t a crisis.

— Juhi Wadia, PC Magazine, 28 Sep. 2026
The material also has a waterproof rating of 5,000mm-plus, a wind resistance of up to 50-mph gusts, and UPF 100 protection for blocking harsh sunrays.

— Olivia Young, Travel + Leisure, 27 Sep. 2026

Definition of waterproof

Adjective

However, the inn isn’t soundproof and probably isn’t the best choice for families with children who are still waking throughout the night.

— Condé Nast, Condé Nast Traveler, 23 Sep. 2026
Emma, Lizzie, and Bridget claimed not to have heard or seen anything (the house was apparently soundproof and sightproof).

— Rafaela Bassili, Vulture, 18 Sep. 2026

Definition of soundproof

Adjective

Raye and the platoon of ace musicians joining her are as vocally and musically airtight as possible.

— Melissa Ruggieri, USA Today, 27 Apr. 2026
The 1984 Olympics had a relatively airtight contract that protected taxpayers, but that’s not the case this time.

— Susan Shelley, Daily News, 18 Feb. 2026

Definition of airtight

Adjective

For now, access appears limited to the steadily expanding group of organizations granted access to Claude Mythos Preview through Anthropic’s — not entirely watertight — private Project Glasswing initiative.

— Robert Hart, The Verge, 9 June 2026
Tunnels are also not truly watertight, requiring drainage measures like sump pumps and creating maintenance and reliability issues, the group advised.

— Skyler Swisher, The Orlando Sentinel, 15 Feb. 2026

Definition of watertight

Adjective

O’Neill, a physics professor at Princeton, argued for the practical possibility of building human habitats that would float between Earth and the moon, housing tens of thousands of people in hermetic environments with earthlike gravity and climate.

— Jacob Weisberg, Vanity Fair, 10 Sep. 2026
This hermetic secrecy is how Allure beauty director Sarah Kinonen and I recently found ourselves in the bathroom of a suite in the Aman hotel on New York’s Fifth Avenue, brushing our teeth while members of the Dyson public relations team looked on.

— Jenny Bailly, Allure, 1 Sep. 2026

Definition of hermetic

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lightplanes

lightproof

lights

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“Lightproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lightproof. Accessed 6 Oct. 2026.

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Synonyms of lightproof

adjective

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